Inspection Procedure

1. Perform troubleshooting in accordance with the chart below.

   Result 

   RESULT CHART
   
   

   Condition	Proceed to
   MIL remains on	A
   MIL is not illuminated	B

B: Go to step  5

A: Go to next step 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch ON and turn the tester ON.
3. Check if DTCs have been stored (see DIAGNOSTIC TROUBLE CODE CHART  ). If DTCs are present, write them down.
4. Clear the DTCs (see DTC CHECK/CLEAR  ).
5. Check that the MIL turns off.

   OK: 

   MIL turns off. 

OK: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS 

NG: Go to next step 

1. Disconnect the E5 ECM connector.
   Fig 1: Disconnecting E5 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Check that the MIL is not illuminated.

   OK: 

   MIL is not illuminated. 

OK: REPLACE ECM 

NG: Go to next step 

1. Disconnect the C8 combination meter connector.
   Fig 2: Identifying C8 Combination Meter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the E5 ECM connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   C8-6 (CHK) - E5-8 (W)	Below 1 Ω
   C8-6 (CHK) or E5-8 (W) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPAIR OR REPLACE COMBINATION METER 

1. Check that the MIL is illuminated when turning the ignition switch ON.

   OK: 

   MIL is illuminated. 

OK: SYSTEM OK 

NG: Go to next step 

1. Turn the ignition switch ON.
2. Start the engine.

   Result 

   RESULT CHART
   
   

   Result	Proceed to
   Engine starts	A
   Engine dose not start*	B
   HINT: *: The intelligent tester cannot communicate with the ECM.

B: GO TO VC OUTPUT CIRCUIT 

A: Go to next step 

1. Disconnect the E5 ECM connector.
   Fig 3: Disconnecting E5 ECM Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Measure the voltage of the wire harness side connectors

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   E5-8 (W) - Body ground	10 to 14 V

OK: REPLACE ECM 

NG: Go to next step 

1. Disconnect the C8 combination meter connector.
   Fig 4: Identifying C8 Combination Meter Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the E5 ECM connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   C8-6 (CHK) - E5-8 (W)	Below 1 Ω
   C8-6 (CHK) or E5-8 (W) - Body ground	10 kΩ or higher

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: REPAIR OR REPLACE COMBINATION METER